<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script type="text/javascript">
    for (var i = 0; i < 110; i++) {
        document.write("测试文字");
    }
</script>

<div style="position:absolute; top: 0px;">
    <div style="background-color: gray">style="background-color: gray</div>
    <div style="background-color: #aaa">background-color: #aaa</div>
    <div style="background-color: #ffff00">background-color: #ffff00</div>
    <div style="background-color: rgb(255,0,255)">ackground-color: rgb(255,0,255)</div>
    <div style="background-color: hsl(120, 80%,50%)">background-color: hsl(120, 80%,50%)</div>
    <div style="background-color: rgba(255,0,255,0.5)"></div>
    <div style="background-color: hsla(120, 80%, 50%, 0.5);"></div>
</div>
</body>

</html>